Over 250 branches nationwide

Or standard £10 delivery charge

Click & Collect

Collect orders in your local branch

Open an Account today

Save time and get exclusive pricing

Cavity Insulation

Showing 1 - 30 of 72 results

SHEFFIELD POLYSTYRENE SHEET CAVITY 1200 x 450 x 25mm

Part number U0108649

£6.01 inc VAT

Enter Location More Detail

Unilin XT/CW Thin-R Partial Fill SP Cavity Board 1200 x 450 x 60mm

Part number U0111938

£12.22 inc VAT

Enter Location More Detail

SHEFFIELD POLYSTYRENE SHEET CAVITY 1200 x 450 x 50mm

Part number U0108650

£12.84 inc VAT

Enter Location More Detail

Unilin XT/CW Thin-R Partial Fill SP Cavity Board 1200 x 450 x 70mm

Part number U0113778

Manf # 400077510

£14.42 inc VAT

Enter Location More Detail

Unilin XT/CW Thin-R Partial Fill SP Cavity Board 1200 x 450 x 80mm

Part number U0113775

Manf # 400077512

£15.56 inc VAT

Enter Location More Detail

Unilin XT/CW Thin-R Partial Fill SP Cavity Board 1200 x 450 x 90mm

Part number U0113774

Manf # 400077514

£17.14 inc VAT

Enter Location More Detail

Unilin XT/CW Thin-R Partial Fill SP Cavity Board 1200 x 450 x 100mm

Part number U0111940

£18.50 inc VAT

Enter Location More Detail

ECOTHERM ECO-CAVITY FULL FILL BOARD 1200 x 450 x 90mm 100000033072

Part number U0006620

£22.37 inc VAT

Enter Location More Detail

Unilin CT/PIR Int Corner Full Fill Cavity Board 1200 x 450 x 100mm

Part number U0217091

Manf # 400073766

£45.01 inc VAT

Enter Location More Detail

ROCKWOOL 209274 RWA45 100mm THICK 1200 x 600mm (4 SLABS PER PK- 2.88m2)

Part number U0091049

£47.36 inc VAT

Enter Location More Detail

Unilin CT/PIR Cavitytherm Full Fill Cavity Board 1200 x 450 x 90mm

Part number U0212877

Manf # 400073759

£48.73 inc VAT

Enter Location More Detail

ROCKWOOL 180898 THERMAL INSULATION CAVITY BATT 100mm THICK 1200 x 455 ( 6 SLABS PER PK -3.38m2)

Part number U0090965

£49.84 inc VAT

Enter Location More Detail

ROCKWOOL 122883 CAVITY BATTS 100 x 1200mm 3.28m2

Part number U0138330

£50.14 inc VAT

Enter Location More Detail

Unilin CT/PIR Ext Corner Full Fill Cavity Board 1200 x 450 x 100mm

Part number U0128418

Manf # 400073771

£51.88 inc VAT

Enter Location More Detail

ROCKWOOL 123325 FLEXI SLAB 100mm THICK 400 x 1200mm (6 SLABS PER PACK - 2.88m2)

Part number U0006563

£56.05 inc VAT

Enter Location More Detail

ROCKWOOL 278734 THERMAL TIMBER FRAME SLAB 140mm THICK 1200 x 570mm (4 SLABS PER PK-2.74m2)

Part number U0091023

£57.71 inc VAT

Enter Location More Detail

ISOVER CAVITY WALL SLAB CWS 36 1200 x 455 x 125mm x 4.37m2 (PACK 8) 5200625451

Part number U0006757

Manf # 5200625451

£58.19 inc VAT

Enter Location More Detail

ISOVER CAVITY WALL SLAB CWS 36 1200 x 455 x 50mm x 10.92m2 (PACK 20) 5200625441

Part number U0006759

Manf # 5200625441

£58.82 inc VAT

Enter Location More Detail

Unilin CT/PIR Int Corner Full Fill Cavity Board 1200 x 450 x 150mm

Part number U0217093

Manf # 400073768

£59.51 inc VAT

Enter Location More Detail

Unilin CT/PIR Ext Corner Full Fill Cavity Board 1200 x 450 x 125mm

Part number U0128419

Manf # 400073772

£60.42 inc VAT

Enter Location More Detail

Unilin CT/PIR Cavitytherm Full Fill Cavity Board 1200 x 450 x 125mm

Part number U0128416

Manf # 400073762

£60.42 inc VAT

Enter Location More Detail

ISOVER CAVITY WALL SLAB CWS 36 1200 x 455 x 65mm x 8.74m2 (PACK 16 ) 5200625443

Part number U0163352

Manf # 5200625443

£60.91 inc VAT

Enter Location More Detail

ROCKWOOL 181176 RWA45 SLAB 50mm 6.48m2

Part number U0138338

£63.97 inc VAT

Enter Location More Detail

KNAUF DRITHERM 32 CAVITY SLAB 1200 x 455 x 125mm x 2.18m2 (PACK 4) 715828

Part number U0093933

£64.68 inc VAT

Enter Location More Detail

Unilin CT/PIR Ext Corner Full Fill Cavity Board 1200 x 450 x 150mm

Part number U0128420

Manf # 400073773

£68.58 inc VAT

Enter Location More Detail

Unilin CT/PIR Cavitytherm Full Fill Cavity Board 1200 x 450 x 150mm

Part number U0128417

Manf # 400073763

£68.58 inc VAT

Enter Location More Detail

ISOVER CAVITY WALL SLAB CWS 36 1200 x 455 x 100mm x 6.55m2 (PACK 12) 5200625449

Part number U0006756

Manf # 5200625449

£69.90 inc VAT

Enter Location More Detail

Unilin XT/TLMF T-Liner 2400 x 1200 x 42.5mm Laminated P/Board (12.5 +30mm Foam)

Part number U0128425

Manf # 400074013

£70.31 inc VAT

Enter Location More Detail

ISOVER CAVITY WALL SLAB CWS 36 1200 x 455 x 75mm x 8.74m2 (PACK 16) 5200625445

Part number U0006760

Manf # 5200625445

£70.54 inc VAT

Enter Location More Detail

ISOVER CAVITY WALL SLAB CWS 34 1200 x 455 x 125mm x 3.28m2 (PACK 6) 5200679860

Part number U0006754

Manf # 5200679860

£72.72 inc VAT

Enter Location More Detail

Cavity Insulation

We stock a vast range of cavity wall insulation products in order to meet the demands of all projects. We are working closely with leading insulation cavity manufacturers Knauf Insulation and Xtratherm to provide a multitude of premium quality products at very competitive prices.

One of the items that Buildbase suppliers is Knauf Dritherm cavity slabs; a no combustible glass mineral wool slab. Dritherm incorporates the environmentally friendly Ecose technology, as well as a water repellent additive, suitable to prevent slabs from being damaged during construction and making them perfect for external wall construction. Full-fill insulation, installed as the wall is built, prevents mortar and debris bridging the cavity thereby creating a moisture bridge.

We stock Dritherm 32 Ultimate and Dritherm 37 Standard. 32 Ultimate offers the best thermal efficiency, the slightly higher price brings long-term savings. All new build homes should be specified with Dritherm 32. 37 Standard is mainly used in extension. If offers a lower thermal performance but retains the water repellent additive and A1 fire rating at a lower price point.

For completing your projects, you can also view our range of plaster, plasterboard and drylining screws.

With so many options for insulation, it’s important to choose the correct one for your project. Please read our guide to insulation.

If you cannot find the product you require or are unsure which product to use, please contact your local branch for assistance. Locate your branch using our branch locator. Or alternatively book an appointment with an expert.

Showing 1 - 30 of 72 results